Patch for Vim 7

The patch adds some functions to the Vim Python interface. The
functions enable a Python script to write directly into the Vim's internal
representation of the screen and read some information that isn't (always)
exposed in unpatched Vim. A patched, configured and compiled version of Vim
will have the feature "+python_screen" enabled.

The following links may be useful (you may need to convert EOLs in all vim files and
the patch to CR-LF with unix2dos):
http://gnuwin32.sourceforge.net/packages/patch.htm
http://gnuwin32.sourceforge.net/packages/cygutils.htm